JP6082989B2 - Wireless communication system, information distribution apparatus, and communication control method - Google Patents

Description

  The present invention relates to a wireless communication system, an information distribution apparatus, and a communication control method, and more particularly to a wireless communication system, an information distribution apparatus, and a communication control method for distributing information related to a disaster.

  In a mobile communication system, a communication service is provided by a radio base station apparatus that forms a cell that is an area in which a radio terminal apparatus can communicate.

  An M2M (Machine to Machine) system is known as a system using such a communication service. In the M2M system, devices equipped with wireless devices exchange information with each other without human intervention, so that the inventory status of products built in vending machines is automatically reported to a server, etc. The device is automatically controlled.

  As an example of the M2M system, for example, Patent Literature 1 (Japanese Patent No. 4237134) discloses the following technology. That is, a mobile communication network having a wireless terminal, a gateway node capable of wireless communication with the wireless terminal, a location information storage device that holds location information of the wireless terminal, and a message transmission destination from the wireless terminal This is a network system in which another network to which a certain terminal is connected is connected via a gateway. The network system includes terminal address holding means for holding the address of the terminal that is a transmission destination predetermined for each wireless terminal. When transmitting a message from the wireless terminal to the terminal, when the gateway node receives a wireless frame from the wireless terminal, the gateway node accesses the terminal address holding unit, and sends a message destination terminal to each wireless terminal. An address is specified, and a message is transmitted to the specified destination terminal via the gateway. When transmitting a message from the terminal to the wireless terminal, the gateway accesses the position information storage device, acquires position information from the ID of the wireless terminal, and the corresponding gateway node from the acquired position information Forward the message to The gateway node transfers the message to the wireless terminal.

Japanese Patent No. 4237134

  When a disaster such as an earthquake occurs, a user who uses such a communication system such as an M2M system tries to connect to the network using, for example, an owned wireless terminal device in order to acquire various types of information.

  However, depending on the state of the wireless terminal device, it is necessary to suppress the operation of acquiring information from the network. For example, it is often difficult to charge the battery of the wireless terminal device during a disaster, and if the information acquisition operation is forcibly performed when the battery of the wireless terminal device is low, the information is obtained due to the battery of the wireless terminal device being exhausted. Etc. will not be possible.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wireless communication system, an information distribution apparatus, and a communication control method capable of supporting information acquisition from a network when a disaster occurs. Is to provide.

  (1) In order to solve the above problems, a wireless communication system according to an aspect of the present invention is connected to one or a plurality of wireless terminal devices, and is connected to the information distribution device. A storage device that stores behavior information related to the behavior of the user, the information distribution device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the storage device, and transmits the acquired behavior information to the wireless The information distribution device acquires terminal information indicating a state of the wireless terminal device, and changes a transmission operation of the behavior information to the wireless terminal device based on the acquired terminal information. .

  (8) In order to solve the above-described problem, an information distribution apparatus according to an aspect of the present invention is an information distribution apparatus that can communicate with one or a plurality of wireless terminal apparatuses, and indicates a state of the wireless terminal apparatus A terminal information acquisition unit for acquiring information; receiving disaster information indicating the occurrence of a disaster; acquiring the behavior information from a storage device that stores behavior information regarding the behavior at the time of the disaster; and acquiring the acquired behavior information as the wireless A behavior information distribution unit that transmits to the terminal device, and the behavior information distribution unit changes a transmission operation of the behavior information to the wireless terminal device based on the terminal information acquired by the terminal information acquisition unit. To do.

  (9) In order to solve the above-described problem, a communication control method according to an aspect of the present invention is a communication control method in an information distribution device capable of communicating with one or a plurality of wireless terminal devices, and indicates a disaster occurrence Receiving the information and acquiring the behavior information from a storage device that stores the behavior information regarding the behavior at the time of disaster occurrence; transmitting the acquired behavior information to the wireless terminal device; and Acquiring terminal information indicating a state, and changing a transmission operation of the behavior information to the wireless terminal device based on the acquired terminal information.

  According to the present invention, it is possible to support information acquisition from a network when a disaster occurs.

FIG. 1 is a diagram showing a configuration of a radio communication system according to an embodiment of the present invention. FIG. 2 is a diagram showing distribution of behavior information by the wireless communication system according to the embodiment of the present invention. FIG. 3 is a diagram showing an example of a usage pattern in the normal time of the wireless communication system according to the embodiment of the present invention. FIG. 4 is a diagram showing information acquisition by the wireless terminal device in the wireless communication system according to the embodiment of the present invention. FIG. 5 is a diagram showing an example of the software configuration and management control of each device in the wireless communication system according to the embodiment of the present invention. FIG. 6 is a diagram showing a configuration of the gateway device in the wireless communication system according to the embodiment of the present invention. FIG. 7 is a flowchart that defines an example of an operation procedure when the gateway device according to the embodiment of the present invention distributes information. FIG. 8 is a flowchart defining an example of an operation procedure when the gateway device according to the embodiment of the present invention changes the transmission operation setting. FIG. 9 is a flowchart defining an example of an operation procedure when the gateway device according to the embodiment of the present invention changes the transmission operation setting. FIG. 10 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the embodiment of the present invention.

  First, the contents of the embodiment of the present invention will be listed and described.

  (1) In order to solve the above problems, a wireless communication system according to an aspect of the present invention is connected to one or a plurality of wireless terminal devices, and is connected to the information distribution device. A storage device that stores behavior information related to the behavior of the user, the information distribution device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the storage device, and transmits the acquired behavior information to the wireless The information distribution device acquires terminal information indicating a state of the wireless terminal device, and changes a transmission operation of the behavior information to the wireless terminal device based on the acquired terminal information. .

  With such a configuration, since it is possible to perform a distribution operation according to the state of the wireless terminal device, such as a state where the battery of the wireless terminal device is low, it is necessary to suppress the operation of acquiring information by connecting to the network In some cases, it is possible to realize an appropriate distribution operation of behavior information. In addition, since the delivery operation can be changed on the behavior information provider side, the selection of information to be delivered is selected compared to a configuration in which the wireless terminal device autonomously restricts reception of behavior information according to its own state. In addition, more appropriate measures such as optimization of distribution operation can be performed. In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  (2) Preferably, the information distribution device selects a part or all of the behavior information stored in the storage device based on the acquired terminal information, and selects the selected behavior information as the wireless terminal. Send to device.

  With such a configuration, it is possible to select and distribute appropriate behavior information according to the state of the wireless terminal device.

  (3) More preferably, the information distribution device selects the behavior information stored in the storage device or summary information of the behavior information based on the acquired terminal information, and selects the selected information from the wireless terminal Send to device.

  With such a configuration, it is possible to adjust the data amount of the behavior information to be distributed according to the state of the wireless terminal device.

  (4) Preferably, the information distribution device periodically transmits the behavior information to the wireless terminal device, and the information distribution device adjusts the transmission cycle of the behavior information based on the acquired terminal information. To do.

  With such a configuration, it is possible to adjust the arrival period of the behavior information in the wireless terminal device according to the state of the wireless terminal device.

  (5) More preferably, the information distribution device acquires terminal information indicating a state of a battery of the wireless terminal device, and the information distribution device receives the behavior information when the remaining battery amount of the wireless terminal device is low. Set a longer transmission cycle.

  With such a configuration, when the battery of the wireless terminal device is low, it is possible to lengthen the behavior information arrival period, suppress the reception operation of the wireless terminal device, and suppress the battery of the wireless terminal device to run out. .

  (6) Preferably, the information distribution device periodically transmits the behavior information to the wireless terminal device, and the information distribution device stores the information stored in the storage device based on the acquired terminal information. A cycle according to the importance of the behavior information is set, and the corresponding behavior information is transmitted to the wireless terminal device at the set cycle.

  With such a configuration, for example, even when the battery of the wireless terminal device is low, it is possible to appropriately set the transmission cycle according to the importance of the behavior information, such as ensuring a relatively short update cycle for important behavior information. It becomes.

  (7) Preferably, the information distribution device changes a transmission operation of the behavior information to the wireless terminal device when the state indicated by the acquired terminal information satisfies a predetermined condition, and changes the transmission operation. When the state indicated by the newly acquired terminal information does not satisfy the predetermined condition, the transmission operation is returned to before the change.

  In this way, when the wireless terminal device is in a normal state, such as when the remaining battery level of the wireless terminal device is restored, the configuration is restored to the normal transmission operation. The acquisition of useful information can be supported.

  (8) In order to solve the above-described problem, an information distribution apparatus according to an aspect of the present invention is an information distribution apparatus that can communicate with one or a plurality of wireless terminal apparatuses, and indicates a state of the wireless terminal apparatus A terminal information acquisition unit for acquiring information; receiving disaster information indicating the occurrence of a disaster; acquiring the behavior information from a storage device that stores behavior information regarding the behavior at the time of the disaster; and acquiring the acquired behavior information as the wireless A behavior information distribution unit that transmits to the terminal device, and the behavior information distribution unit changes a transmission operation of the behavior information to the wireless terminal device based on the terminal information acquired by the terminal information acquisition unit. To do.

  With such a configuration, since it is possible to perform a distribution operation according to the state of the wireless terminal device, such as a state where the battery of the wireless terminal device is low, it is necessary to suppress the operation of acquiring information by connecting to the network In some cases, it is possible to realize an appropriate distribution operation of behavior information. In addition, since the delivery operation can be changed on the behavior information provider side, the selection of information to be delivered is selected compared to a configuration in which the wireless terminal device autonomously restricts reception of behavior information according to its own state. In addition, more appropriate measures such as optimization of distribution operation can be performed. In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  (9) In order to solve the above-described problem, a communication control method according to an aspect of the present invention is a communication control method in an information distribution device capable of communicating with one or a plurality of wireless terminal devices, and indicates a disaster occurrence Receiving the information and acquiring the behavior information from a storage device that stores the behavior information regarding the behavior at the time of disaster occurrence; transmitting the acquired behavior information to the wireless terminal device; and Acquiring terminal information indicating a state, and changing a transmission operation of the behavior information to the wireless terminal device based on the acquired terminal information.

  With such a configuration, since it is possible to perform a distribution operation according to the state of the wireless terminal device, such as a state where the battery of the wireless terminal device is low, it is necessary to suppress the operation of acquiring information by connecting to the network In some cases, it is possible to realize an appropriate distribution operation of behavior information. In addition, since the delivery operation can be changed on the behavior information provider side, the selection of information to be delivered is selected compared to a configuration in which the wireless terminal device autonomously restricts reception of behavior information according to its own state. In addition, more appropriate measures such as optimization of distribution operation can be performed. In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<First Embodiment>
[Configuration and basic operation]
FIG. 1 is a diagram showing a configuration of a radio communication system according to an embodiment of the present invention.

  With reference to FIG. 1, the wireless communication system 301 includes a management device 101, a storage device 151, one or more gateway devices (information distribution devices) 111, and one or more storage devices 121. The management apparatus 101 may include a storage device 151. Further, the gateway device 111 may include a storage device 121. Further, the wireless communication system 301 may include a plurality of management devices 101 or a plurality of storage devices 151. In FIG. 1, the wireless communication system 301 includes two sets of the gateway device 111 and the storage device 121, but may have a configuration including one set or three or more sets.

  The gateway device 111 is, for example, a wireless LAN access point, is connected to the management device 101 via the network 251, and relays communication between one or more wireless terminal devices 202 and the management device 101. The gateway device 111 is wired or wirelessly connected to the network 251.

  The management device 101 can communicate with a plurality of wireless terminal devices 202 via the network 251 and the gateway device 111.

  The network 251 includes, for example, a mobile wireless communication system conforming to LTE (Long Term Evolution) standardized by 3GPP (Third Generation Partnership Project), or a wireless LAN system standardized by IEEE 802.11.

  The wireless terminal device 202 can communicate with other devices such as the management device 101 via the network 251 by transmitting and receiving wireless signals to and from the gateway device 111.

  The sensor 161 can communicate with other devices such as the management device 101 via the network 251 by performing wired communication or wireless communication with a communication device in the network 251.

  Note that the wireless communication system 301 may include a device that provides some information in addition to the sensor 161 or instead of the sensor 161.

  The storage device 151 is connected to the management device 101. The storage device 151 stores a database of behavior information related to behavior at the time of disaster occurrence.

  The storage device 121 is connected to the gateway device 111 and stores a local database of the behavior information.

  This behavior information includes information that serves as a guideline for the behavior of the user of the wireless terminal device 202 or a guideline for the behavior of another person such as a doctor. Further, this behavior information is updated regularly or irregularly regardless of the occurrence of a disaster.

  Specifically, for example, the management device 101 and the storage device 151 are provided in units of areas such as municipalities, and the storage device 151 includes hazard maps such as information on shelters, traffic information, disaster status, and evacuation instructions. The information is memorized. For example, the hazard map is updated by the local government during normal times. Further, the storage device 151 may store information obtained by data analysis of website information.

  Further, the storage device 151 may store information before the occurrence of the disaster, or may store various information after the occurrence of the disaster. Specifically, for example, traffic information, location information of nearby hospitals and shelters, medical information such as medical records, weather forecasts, and safety information can be stored in the storage device 151. Further, for example, in a state where a certain amount of time has passed since the occurrence of the disaster, traffic information obtained by analyzing data such as Twitter (registered trademark) and Facebook (registered trademark) is stored in the storage device 151. Is also possible.

  Information stored in the storage device 151 can be different for each area. For example, in a state where a certain amount of time has passed since the occurrence of the disaster, information such as food, electricity and gas is stored in the disaster-affected center area. Also, information such as traffic information and neighborhood maps is stored in an area far from the disaster center.

  FIG. 2 is a diagram showing distribution of behavior information by the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 2, gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from storage device 121, and notifies each wireless terminal device 202 of the acquired behavior information. The gateway device 111 receives disaster information indicating the occurrence of a disaster from the management device 101, for example.

  The disaster information may be information from sensors, earthquake measuring instruments, or the like, or the operator may notify the management apparatus 101 of the disaster information manually.

  FIG. 3 is a diagram showing an example of a usage pattern in the normal time of the wireless communication system according to the embodiment of the present invention.

  With reference to FIG. 3, the sensor 161 measures the amount of power used, the amount of gas used, and the like, and transmits sensor information indicating the measurement result to the management apparatus 101 via the network 251.

  The management device 101 stores the sensor information received from the sensor 161 in the storage device 151.

  The sensor information stored in the storage device 151 is used for data collection and analysis of public services.

  In this way, the configuration for collecting public service data during normal times allows the storage device 151 to be used effectively, and the versatility of the system can be improved.

  FIG. 4 is a diagram showing information acquisition by the wireless terminal device in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 4, gateway device 111 receives an information request from wireless terminal device 202, and acquires behavior information indicated by the information request from a local database in storage device 121. Then, the gateway device 111 unicasts the acquired behavior information to the wireless terminal device 202.

  As described above, the gateway device 111 can perform both push type information distribution and pull type information distribution.

  Thereby, the user can acquire information, such as electricity, gas, food, etc. which are needed for future life after a disaster occurs independently.

  FIG. 5 is a diagram showing an example of the software configuration and management control of each device in the wireless communication system according to the embodiment of the present invention.

[access point]
With reference to FIG. 5, the gateway device 111 includes a communication unit 20 and an application 21. The communication unit 20 includes a TCP processing unit 22, an IP processing unit 23, an Ether MAC processing unit 24, an Ether PHY processing unit 25, a wireless LAN MAC processing unit 26, and a wireless LAN PHY processing unit 27.

  The gateway device 111 operates according to a protocol having a plurality of hierarchized layers. In the gateway device 111, the application 21 performs application layer processing.

  The TCP processing unit 22 performs TCP layer processing. The IP processing unit 23 performs processing of an IP layer lower than the TCP layer. The Ether MAC processing unit 24 is for communication with the management apparatus 101, and performs processing of an Ethernet (registered trademark) MAC layer lower than the IP layer. The Ether PHY processing unit 25 is for communication with the management apparatus 101, and performs processing of the Ethernet PHY layer lower than the MAC layer.

  The wireless LAN MAC processing unit 26 is for communication with the wireless terminal device 202, and performs processing of a wireless LAN MAC layer lower than the IP layer. The wireless LAN PHY processing unit 27 is for communication with the wireless terminal device 202, and performs processing of a wireless LAN PHY layer lower than the MAC layer.

  The communication unit 20 receives a communication signal from the wireless terminal device 202, converts the received communication signal into an IP frame, and outputs the IP frame to the application 21.

  The application 21 acquires terminal information from the IP frame received from the communication unit 20 and registers it in the local database of the storage device 121, for example. This terminal information includes information indicating the state of the wireless terminal device 202, such as battery information and communication quality.

  For example, the application 21 determines whether or not to change the transmission operation of the distribution information to the wireless terminal device 202 based on the acquired terminal information, and when it is determined to change, the content of the transmission operation after the change Is transmitted to the communication unit 20. Here, the distribution information includes at least action information.

  The communication unit 20 changes the transmission cycle of the distribution information based on the transmission change information received from the application 21.

  In addition, for example, the application 21 changes the transmission operation of the distribution information by changing the distribution information creation reference based on the acquired terminal information.

[Wireless terminal device]
The wireless terminal device 202 includes a communication unit 30, an application 31, a sensor 36, and a battery 37. The communication unit 30 includes a TCP processing unit 32, an IP processing unit 33, a wireless LAN MAC processing unit 34, and a wireless LAN PHY processing unit 35.

  The wireless terminal device 202 operates according to a protocol having a plurality of hierarchized layers.

  The application 31 performs application layer processing. For example, the application 31 acquires information indicating the state of the wireless terminal device 202 from the wireless LAN MAC processing unit 34, the wireless LAN PHY processing unit 35, the sensor 36, or the battery 37, and creates terminal information including these pieces of information. Note that the application 31 can perform processes other than the creation and transmission process of terminal information, for example.

  The TCP processing unit 32 performs processing of a TCP layer lower than the application layer. The IP processing unit 33 performs processing of an IP layer lower than the TCP layer. The wireless LAN MAC processing unit 34 performs processing of a MAC layer lower than the IP layer. The wireless LAN PHY processing unit 35 performs processing of a PHY layer lower than the MAC layer.

  For example, the wireless LAN MAC processing unit 34 or the wireless LAN PHY processing unit 35 includes a packet loss rate received by its own wireless terminal device 202, the number of retransmissions of packets transmitted by its own wireless terminal device 202, and its own wireless terminal. The reception intensity of the radio signal in the apparatus 202 is measured. Then, the wireless LAN MAC processing unit 34 or the wireless LAN PHY processing unit 35 outputs measurement information indicating the measurement result to the application 31.

  For example, the sensor 36 detects the temperature of its own wireless terminal device 202 and outputs the detection result to the application 31. Further, the battery 37 outputs, for example, information indicating the remaining amount of power storage to the application 31.

  Then, the application 31 outputs the created terminal information to the communication unit 30. The communication unit 30 transmits a communication signal including terminal information received from the application 31 to the application 21 of the gateway device 111.

  The communication unit 30 receives a communication signal from the gateway device 111, converts the communication signal into an IP frame, and outputs the IP frame to the application 31.

  The application 31 acquires distribution information from the application 21 of the gateway device 111 from the IP frame received from the communication unit 30. And the application 31 performs the process which shows the content of the acquired delivery information to a user.

[Management device]
The management apparatus 101 includes a communication unit 10 and an application 11. The communication unit 10 includes a TCP processing unit 12, an IP processing unit 13, an Ether MAC processing unit 14, and an Ether PHY processing unit 15.

  The management apparatus 101 operates according to a protocol having a plurality of hierarchized layers. In the management apparatus 101, the application 11 performs application layer processing.

  In the management apparatus 101, the TCP processing unit 12 performs processing of a TCP layer lower than the application layer. The IP processing unit 13 performs processing of an IP layer lower than the TCP layer. The Ether MAC processing unit 14 performs processing of a MAC layer lower than the IP layer. The Ether PHY processing unit 15 performs processing of a PHY layer lower than the MAC layer.

  The communication unit 10 receives a communication signal from the wireless terminal device 202 via the gateway device 111, converts the received communication signal into an IP frame, and outputs the IP frame to the application 11.

  The application 11 acquires terminal information from the IP frame received from the communication unit 10 and registers it in the database of the storage device 151, for example. This terminal information includes, for example, information indicating the state of the wireless terminal device 202, such as battery information and communication quality.

  FIG. 6 is a diagram showing a configuration of the gateway device in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 6, gateway device 111 includes behavior information distribution unit 51, terminal information acquisition unit 52, and database update unit 53.

  The behavior information distribution unit 51 receives disaster information indicating the occurrence of a disaster from, for example, the management device 101 and acquires the behavior information from the local database of the storage device 121. The behavior information distribution unit 51 notifies each wireless terminal device 202 of the acquired behavior information, or unicasts the acquired behavior information to the wireless terminal device 202.

  For example, the behavior information distribution unit 51 selects and acquires part or all of the behavior information stored in the storage device 121.

  The terminal information acquisition unit 52 acquires terminal information indicating the state of the wireless terminal device 202. For example, the terminal information acquisition unit 52 acquires terminal information indicating the state of the battery 37 of the wireless terminal device 202 or the communication quality of the wireless terminal device 202.

  The behavior information distribution unit 51 changes the transmission operation of the behavior information to the wireless terminal device 202 based on the terminal information acquired by the terminal information acquisition unit 52.

  The database update unit 53 synchronizes the local database of the storage device 121 with the database of the storage device 151 regularly or irregularly and updates the information in the local database. For example, the database update unit 53 transmits an update information request to the management apparatus 101 regularly or irregularly. The database update unit 53 updates the local database in the storage device 121 based on the update information received from the management device 101.

[Operation]
Next, information distribution by the wireless communication system according to the embodiment of the present invention will be described with reference to the drawings.

  Each device in the wireless communication system 301 reads and executes a program including each step of the following flowchart and sequence from a memory (not shown). This program can be installed externally.

  FIG. 7 is a flowchart that defines an example of an operation procedure when the gateway device according to the embodiment of the present invention distributes information.

  The gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 121, and transmits the acquired behavior information to the wireless terminal device 202. The gateway device 111 acquires terminal information indicating the state of the wireless terminal device 202, and changes the behavior information transmission operation to the wireless terminal device 202 based on the acquired terminal information.

  Further, for example, the gateway device 111 selects a part or all of the behavior information stored in the storage device 121 based on the acquired terminal information, and transmits the selected behavior information to the wireless terminal device 202. .

  For example, the gateway device 111 changes the transmission operation of the behavior information to the wireless terminal device 202 when the state indicated by the acquired terminal information satisfies a predetermined condition, changes the transmission operation, and then newly acquires the terminal. When the state indicated by the information does not satisfy the predetermined condition, the transmission operation is returned to before the change.

  Specifically, referring to FIG. 7, first, when gateway apparatus 111 receives disaster information from management apparatus 101 in a state where disaster information has not been received (YES in step S1), local information in storage apparatus 121 is stored. Distribution information is acquired from the database (step S2).

  Next, the gateway device 111 broadcasts the acquired distribution information to the wireless terminal device 202 (step S3).

  Next, when the gateway apparatus 111 receives an information request from the wireless terminal apparatus 202 (YES in step S4), the gateway apparatus 111 acquires distribution information corresponding to the information request from the local database (step S5), and sends the information to the wireless terminal apparatus 202. Unicast (step S6).

  Next, when the gateway device 111 receives the terminal information from the wireless terminal device 202 (YES in step S7), whether or not to change the transmission operation setting of the distribution information to the wireless terminal device 202 based on the terminal information. If it is determined that the transmission operation is to be changed, the transmission operation setting is changed (step S8).

  Next, when the gateway apparatus 111 receives an information request from the wireless terminal apparatus 202 (YES in step S4), the gateway apparatus 111 acquires distribution information corresponding to the information request from the local database according to the new transmission operation setting (step S5). ) And unicast to the wireless terminal device 202 (step S6).

  Note that the gateway device 111 is not limited to a configuration that broadcasts distribution information, and may be configured to perform multicasting.

  The gateway device 111 is not limited to the configuration for acquiring the disaster information from the management device 101, and may be configured to acquire the disaster information by another method.

  FIG. 8 is a flowchart defining an example of an operation procedure when the gateway device according to the embodiment of the present invention changes the transmission operation setting.

  Based on the acquired terminal information, the gateway device 111 selects behavior information or summary information of behavior information stored in the storage device 121 and transmits the selected information to the wireless terminal device 202.

  Further, for example, the gateway device 111 changes the transmission operation of the behavior information to the wireless terminal device 202 when the battery of the wireless terminal device 202 is low, and after changing the transmission operation, When the remaining battery level is restored, the transmission operation is returned to the state before the change.

  Specifically, referring to FIG. 8, for example, the gateway device 111 indicates that the terminal information received from the wireless terminal device 202 indicates a battery state, and the remaining battery level of the wireless terminal device 202 is equal to or greater than a predetermined threshold value. (NO in step S11), the normal transmission mode is selected. That is, the gateway device 111 acquires behavior information corresponding to the information request from the local database of the storage device 121 and unicasts the acquired behavior information to the wireless terminal device 202. For example, this behavior information is information on a Web page to which an object such as an image is added (step S13).

  On the other hand, when the remaining battery level of the wireless terminal device 202 is less than the predetermined threshold value (YES in step S11), the gateway device 111 selects the outline information transmission mode. That is, the gateway device 111 acquires behavior information corresponding to the information request from the local database of the storage device 121, creates summary information of the acquired behavior information, and unicasts it to the wireless terminal device 202. For example, the summary information is information on a text-based Web page obtained by deleting an object such as an image from the corresponding action information (step S12).

  The wireless terminal device 202 can also request the corresponding behavior information from the gateway device 111 after receiving the summary information of the behavior information from the gateway device 111.

  FIG. 9 is a flowchart defining an example of an operation procedure when the gateway device according to the embodiment of the present invention changes the transmission operation setting.

  The gateway device 111 periodically transmits behavior information to the wireless terminal device 202. And the gateway apparatus 111 adjusts the transmission period of action information based on the acquired terminal information.

  For example, the gateway device 111 acquires terminal information indicating the state of the battery 37 of the wireless terminal device 202. When the battery of the wireless terminal device 202 is low, the gateway device 111 sets the action information transmission cycle longer.

  Further, for example, the gateway device 111 sets a cycle according to the importance of the behavior information stored in the storage device 121 based on the acquired terminal information, and transmits the corresponding behavior information in the set cycle to the wireless terminal device 202. Send to.

  Specifically, referring to FIG. 9, for example, the gateway device 111 indicates that the terminal information received from the wireless terminal device 202 indicates a battery state, and the remaining battery level of the wireless terminal device 202 is equal to or greater than a predetermined threshold value. (NO in step S21), the normal transmission cycle Tn is selected. That is, the gateway device 111 acquires behavior information corresponding to the information request from the local database of the storage device 121, and repeats the operation of unicasting the acquired behavior information to the wireless terminal device 202 at the transmission cycle Tn (step S24).

  On the other hand, the gateway device 111 is a case where the remaining battery level of the wireless terminal device 202 is less than a predetermined threshold (YES in step S21), and the importance of the action information corresponding to the information request from the wireless terminal device 202 is high. If it is less than the predetermined threshold (YES in step S22), a power saving transmission cycle Ts is selected. That is, the gateway device 111 acquires behavior information corresponding to the information request from the local database of the storage device 121, and repeats the operation of unicasting the acquired behavior information to the wireless terminal device 202 at the transmission cycle Ts. Here, Tn <Ts. That is, when the battery level of the wireless terminal device 202 is low and the importance of the behavior information to be transmitted is not high, the gateway device 111 sets the behavior information transmission cycle longer than the normal time (step S23). .

  Further, the gateway device 111 is a case where the remaining battery level of the wireless terminal device 202 is less than a predetermined threshold (YES in step S21), and the importance of the action information corresponding to the information request from the wireless terminal device 202 is high. If it is equal to or greater than the predetermined threshold (NO in step S22), a normal transmission cycle Tn is selected. That is, even when the battery level of the wireless terminal device 202 is low, the gateway device 111 avoids setting a long transmission period of behavior information when the importance of behavior information to be transmitted is high (step S24). ).

  The gateway device 111 is not limited to the configuration in which the transmission cycle is set in two stages, but may be configured to set the transmission cycle in steps according to the importance of the behavior information.

  In the gateway device 111, the operations shown in FIGS. 8 and 9 can be combined. That is, the gateway device 111 may change both the behavior information transmission cycle and the behavior information based on the terminal information from the wireless terminal device 202.

  FIG. 10 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 10, first, when a disaster detection apparatus (not shown) detects the occurrence of a disaster (step S31), it transmits disaster information to the management apparatus 101 (step S32).

  Next, the management apparatus 101 transmits the disaster information received from the disaster detection apparatus to the gateway apparatus 111 (step S33).

  Next, the gateway device 111 receives disaster information from the management device 101 and broadcasts distribution information to the wireless terminal device 202 (step S34).

  Next, the sensor 161 transmits sensor information to the management apparatus 101, for example, when a new measurement result is obtained (step S35).

  Next, the management apparatus 101 receives new sensor information from the sensor 161, creates update information based on the content of the sensor information, and transmits it to the gateway apparatus 111 (step S36).

  Further, the management apparatus 101 updates the database of the storage device 151 based on the update information (step S37).

  Next, the gateway device 111 creates distribution information based on the update information received from the management device 101, and broadcasts it to the wireless terminal device 202 (step S38).

  Further, the gateway device 111 updates the local database in the storage device 121 based on the update information (step S39).

  Next, the wireless terminal device 202 transmits an information request indicating a request for distribution of certain information to the gateway device 111 (step S40).

  Next, the gateway device 111 acquires the distribution information corresponding to the information request from the local database, and repeats the operation of unicasting to the wireless terminal device 202, for example, at a normal transmission cycle Tn (steps S41 and S42).

  Next, the wireless terminal device 202 transmits terminal information to the gateway device 111. Note that the wireless terminal device 202 may be configured to periodically transmit terminal information or may be configured to transmit when its own state changes (step S43).

  Next, the gateway device 111 determines whether or not to change the transmission operation of the distribution information based on the terminal information received from the wireless terminal device 202, and changes the transmission operation setting when it is determined to change it. For example, the gateway device 111 changes the transmission cycle of distribution information from Tn to Ts (step S44).

  Next, the gateway device 111 acquires the distribution information corresponding to the information request from the local database and repeats the operation of unicasting to the wireless terminal device 202 at the power saving transmission cycle Ts (steps S45 and S46). .

  In the wireless communication system according to the embodiment of the present invention, the gateway device 111 is configured to unicast the behavior information to the wireless terminal device 202 after broadcasting the behavior information to each wireless terminal device 202. However, the present invention is not limited to this. The gateway device 111 may be configured to multicast the behavior information to a plurality of wireless terminal devices 202 after broadcasting the behavior information to each wireless terminal device 202. Specifically, for example, the gateway device 111 groups the wireless terminal devices 202 according to the remaining battery level based on the terminal information received from each wireless terminal device 202, and the content of information to be transmitted and the transmission cycle Etc. are set for each group.

  In the wireless communication system according to the embodiment of the present invention, the gateway device 111 receives disaster information, broadcasts behavior information to each wireless terminal device 202, and then multicasts the behavior information to a plurality of wireless terminal devices 202. However, the present invention is not limited to this. The gateway device 111 may be configured to unicast the behavior information to the wireless terminal device 202 without broadcasting the behavior information after receiving the disaster information.

  By the way, when a disaster such as an earthquake occurs, a user who uses a communication system such as an M2M system tries to connect to a network using, for example, a wireless terminal device that he owns in order to acquire various types of information. However, depending on the state of the wireless terminal device, it is necessary to suppress the operation of acquiring information from the network. For example, it is often difficult to charge the battery of the wireless terminal device during a disaster, and if the information acquisition operation is forcibly performed when the battery of the wireless terminal device is low, the information is obtained due to the battery of the wireless terminal device being exhausted. Etc. will not be possible.

  On the other hand, in the wireless communication system according to the embodiment of the present invention, the storage device 121 is connected to the gateway device 111 and stores behavior information related to actions at the time of disaster occurrence. The gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 121, and transmits the acquired behavior information to the wireless terminal device 202. And the gateway apparatus 111 acquires the terminal information which shows the state of the radio | wireless terminal apparatus 202, and changes the transmission operation | movement to the said radio | wireless terminal apparatus 202 of the action information based on the acquired terminal information.

  In the gateway device according to the embodiment of the present invention, the terminal information acquisition unit 52 acquires terminal information indicating the state of the wireless terminal device 202. The behavior information distribution unit 51 receives the disaster information indicating the occurrence of the disaster, acquires the behavior information from the storage device 121 that stores the behavior information regarding the behavior at the time of the disaster, and transmits the acquired behavior information to the wireless terminal device 202. Send. Then, the behavior information distribution unit 51 changes the transmission operation of the behavior information to the wireless terminal device 202 based on the terminal information acquired by the terminal information acquisition unit 52.

  With such a configuration, it is possible to perform a distribution operation in accordance with the state of the wireless terminal device 202, such as a state where the battery of the wireless terminal device 202 is low, and thus suppress an operation of acquiring information by connecting to the network. When necessary, an appropriate distribution operation of behavior information can be realized. In addition, since the distribution operation can be changed on the behavior information provider side, the wireless terminal device 202 discards the information to be distributed as compared to the configuration in which the wireless terminal device 202 autonomously restricts reception of the behavior information according to its own state. More appropriate measures such as optimization of selection and distribution operations can be performed.

  In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs.

  Therefore, the wireless communication system and the gateway device according to the embodiment of the present invention can support information acquisition from the network when a disaster occurs.

  Further, in the wireless communication system according to the embodiment of the present invention, gateway device 111 selects and selects part or all of the behavior information stored in storage device 121 based on the acquired terminal information. The behavior information is transmitted to the wireless terminal device 202.

  With such a configuration, it is possible to select and distribute appropriate behavior information according to the state of the wireless terminal device 202.

  In the wireless communication system according to the embodiment of the present invention, the gateway device 111 selects the action information stored in the storage device 121 or the summary information of the action information based on the acquired terminal information, and the selected information. Is transmitted to the wireless terminal device 202.

  With such a configuration, the data amount of the behavior information to be distributed can be adjusted according to the state of the wireless terminal device 202.

  In the wireless communication system according to the embodiment of the present invention, gateway device 111 periodically transmits behavior information to wireless terminal device 202. And the gateway apparatus 111 adjusts the transmission period of action information based on the acquired terminal information.

  With such a configuration, the arrival period of action information in the wireless terminal device 202 can be adjusted according to the state of the wireless terminal device 202.

  In the wireless communication system according to the embodiment of the present invention, gateway device 111 acquires terminal information indicating the state of battery 37 of wireless terminal device 202. And the gateway apparatus 111 sets the transmission period of action information long when the battery remaining amount of the radio | wireless terminal apparatus 202 is small.

  With this configuration, when the battery of the wireless terminal device 202 is low, the behavior information arrival period is lengthened, the reception operation of the wireless terminal device 202 is suppressed, and the battery of the wireless terminal device 202 is depleted. be able to.

  In the wireless communication system according to the embodiment of the present invention, gateway device 111 periodically transmits behavior information to wireless terminal device 202. Then, the gateway device 111 sets a cycle according to the importance of the behavior information stored in the storage device 121 based on the acquired terminal information, and transmits the corresponding behavior information to the wireless terminal device 202 with the set cycle. To do.

  With such a configuration, for example, even when the battery level of the wireless terminal device 202 is low, an appropriate setting of the transmission cycle according to the importance of the behavior information is made, such as ensuring a relatively short update cycle for the important behavior information. It becomes possible.

  In the wireless communication system according to the embodiment of the present invention, gateway device 111 changes the transmission operation of behavior information to wireless terminal device 202 when the state indicated by the acquired terminal information satisfies a predetermined condition, and transmits the behavior information. After the operation is changed, if the state indicated by the newly acquired terminal information does not satisfy the predetermined condition, the transmission operation is returned to the state before the change.

  As described above, the wireless terminal device 202 is restored to the normal transmission operation when the wireless terminal device 202 is in a normal state, such as when the remaining battery level of the wireless terminal device 202 is restored, and the state of the wireless terminal device 202 is taken into consideration. It can support the acquisition of useful information at the time of disaster.

  In the wireless communication system according to the embodiment of the present invention, the gateway device 111 is configured to change the behavior information transmission operation to the wireless terminal device 202 based on the terminal information received from the wireless terminal device 202. However, the present invention is not limited to this. The management device 101 acquires behavior information from the database of the storage device 151 as an information distribution device, transmits the behavior information to the wireless terminal device 202, and based on the terminal information received from the wireless terminal device 202, the behavior information wireless terminal device 202 The transmission operation may be changed. In this case, for example, in the configuration shown in FIG. 5, the application 11 performs the same operation as the application 21, and the communication unit 10 performs the same operation as the communication unit 20. Such a management apparatus 101 can be applied to a wireless communication system that does not include the gateway apparatus 111 and the storage apparatus 121, for example.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

10, 20, 30 Communication unit 11, 21, 31 Application 12, 22, 32 TCP processing unit 13, 23, 33 IP processing unit 14, 24 Ether MAC processing unit 15, 25 Ether PHY processing unit 26, 34 Wireless LAN MAC processing Units 27 and 35 Wireless LAN PHY processing unit 51 Behavior information distribution unit 52 Terminal information acquisition unit 53 Database update unit 101 Management device (information distribution device)
111 Gateway device (information distribution device)
121, 151 Storage device 161 Sensor 202 Wireless terminal device 251 Network 301 Wireless communication system

Claims (8)

An information distribution device capable of communicating with one or more wireless terminal devices;
A storage device that is connected to the information distribution device and stores behavior information related to behavior at the time of a disaster;
The information distribution device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the storage device, transmits the acquired behavior information to the wireless terminal device,
The information distribution device acquires terminal information indicating the state of the wireless terminal device, changes the transmission operation of the behavior information to the wireless terminal device based on the acquired terminal information ,
The information distribution device periodically transmits the behavior information to the wireless terminal device,
The information distribution device adjusts a transmission cycle of the behavior information based on the acquired terminal information,
The information distribution device acquires the terminal information indicating a battery state of the wireless terminal device,
The information distribution device groups the wireless terminal devices according to the remaining battery level of each wireless terminal device, sets the transmission cycle for each group, and periodically multicasts the behavior information to the group A wireless communication system.   The information distribution device selects part or all of the behavior information stored in the storage device based on the acquired terminal information, and transmits the selected behavior information to the wireless terminal device. Item 2. The wireless communication system according to Item 1.   The information distribution device, based on the acquired terminal information, selects the behavior information stored in the storage device or summary information of the behavior information, and transmits the selected information to the wireless terminal device. The wireless communication system according to 2. The information distribution device acquires terminal information indicating a state of a battery of the wireless terminal device;
The wireless communication system according to any one of claims 1 to 3, wherein the information distribution device sets a long transmission cycle of the behavior information when the remaining battery level of the wireless terminal device is low. The information distribution device periodically transmits the behavior information to the wireless terminal device,
The information distribution device sets a cycle according to the importance of the behavior information stored in the storage device based on the acquired terminal information, and transmits the behavior information corresponding to the set cycle to the wireless terminal The radio | wireless communications system of any one of Claims 1-4 transmitted to an apparatus. The information distribution device changes the transmission operation of the behavior information to the wireless terminal device when the state indicated by the acquired terminal information satisfies a predetermined condition, changes the transmission operation, and then acquires the newly acquired information. The wireless communication system according to any one of claims 1 to 5 , wherein when the state indicated by the terminal information does not satisfy the predetermined condition, the transmission operation is returned to before the change. An information distribution device capable of communicating with one or more wireless terminal devices,
A terminal information acquisition unit for acquiring terminal information indicating a state of the wireless terminal device;
A behavior information distribution unit that receives disaster information indicating the occurrence of a disaster, acquires the behavior information from a storage device that stores behavior information related to behavior at the time of the disaster, and transmits the acquired behavior information to the wireless terminal device; With
The behavior information distribution unit changes the transmission operation of the behavior information to the wireless terminal device based on the terminal information acquired by the terminal information acquisition unit ,
The information distribution device periodically transmits the behavior information to the wireless terminal device,
The information distribution device adjusts a transmission cycle of the behavior information based on the acquired terminal information,
The information distribution device acquires the terminal information indicating a battery state of the wireless terminal device,
The information distribution device groups the wireless terminal devices according to the remaining battery level of each wireless terminal device, sets the transmission cycle for each group, and periodically multicasts the behavior information to the group An information distribution device. A communication control method in an information distribution apparatus capable of communicating with one or a plurality of wireless terminal apparatuses,
Receiving the disaster information indicating the occurrence of the disaster and acquiring the behavior information from a storage device that stores the behavior information regarding the behavior at the time of the disaster; and
Transmitting the acquired behavior information to the wireless terminal device;
Obtaining terminal information indicating a state of the wireless terminal device;
Based on the acquired terminal information, see containing and changing the transmission operation to the wireless terminal device of said action information,
In the step of transmitting the behavior information, the behavior information is periodically transmitted to the wireless terminal device,
In the step of changing the transmission operation, the transmission period of the behavior information is adjusted based on the acquired terminal information,
In the step of acquiring the terminal information, the terminal information indicating the state of the battery of the wireless terminal device is acquired,
In the step of changing the transmission operation, the wireless terminal devices are grouped according to the remaining battery level of each wireless terminal device, and the transmission cycle is set for each group,
In the step of transmitting the behavior information, a communication control method of periodically multicasting the behavior information to the group .

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